13
OIDMANUAL 1219
KAM CONTROLS, INC.
I N S TA L L AT I O N C O N T I N U E D
WIRING
• The installed 3/4” NPT plug is not part of the instrument installation and should be replaced by the appropriate Ex
certified 3/4” NPT plug for the final installation.
• The KAM OID EX shall be connected by means of suitable cable entries, resp. conduit systems which correspond
technically to the requirements at least of the standard conditions, indicated on the cover sheet of the referenced
ATEX certification, and for which a separate test certificate is available. Thereby the operating conditions specified in
the appropriate certificates of the components are to be considered absolutely.
• Cables entries (heavy-gauge screwed cable glands) and sealing plugs of simple construction shall not be used.
For connection of the OID by means of an approved conduit entry, the associated sealing device must be arranged
directly at the enclosure.
• Non-used openings shall be sealed according to EN 60079-1, section 13.8.
• The connecting lead of the OID shall be installed as permanent installation and as such that it is sufficiently
protected against damage.
TYPICAL POWER AND LOOP WIRING CONFIGURATION
POWER (+)
POWER (-)
4-20mA (+)
4-20mA (-)
POWER SUPPLY
24VDC
(2 Watts)
ISOLATED
RECEIVER
INPUT
(+)
(-)
(+)
(-)
(+)
(-)
RECEIVER
INPUT
(+)
POWER SUPPLY
POWER (+)
POWER (-)
4-20mA (+)
4-20mA (-)
(-)
WRONG
WIRING
The 4-20 mA (-) and power supply (-)
can not be the same or connected
together.
POWER SUPPLY
(+)
(-)
(-)
(+)
POWER (+)
POWER (-)
4-20mA (+)
4-20mA (-)
WRONG
WIRING
The OID provides power for the 4-20mA
loop adding external power can damage
4-20mA output.
RECEIVER
INPUT
OID
OID
OID
TYPICAL
WIRING
24VDC
(2 Watts)
24VDC
(2 Watts)
FIG. 3-12
